The best waterproof storage boxes, compared.
Top pick: Keter Kentwood 190L Best value: Keter Kentwood 190L – Lowest price in this set, about £44.45, with a printed 110 kg line and a tool-free claim. Not a lab test. Updated October 2026.
A waterproof storage box is a lidded outdoor chest for cushions, tools or boots. In the UK you buy one so seat pads stay under a lid on a patio. You recognise a suitable box by the internal centimetres, the water wording on the specifications table, whether a lock is in the carton, and any kilogram figure printed before anyone sits. About 190 and 270 litres are labels, not a fit test. Four seat cushions and two backs sit near 200 to 250 litres on a retailer rule of thumb, not a measurement of one chest. Judge the specifications table, not the title. A waterproof heading can sit beside a row that only says water resistant. An IP code is not usual, and BS EN 60529 is what one would mean. A kilogram line is a seller figure. BS EN 581-2 uses people up to 110 kg and skips weather ageing. An empty chest needs weight in a gust. Shut only dry items inside. Those checks are in the [waterproof storage box buying guide](/hub/garden-furniture/waterproof-storage-box/sub/waterproof-storage-box-buying-guide).
A waterproof storage box is a lidded outdoor chest for cushions, tools or boots. In the UK you buy one so seat pads stay under a lid on a patio.
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Personal buying guide
Question 1 of 2
How much wall do you have?
The brown Keter Kentwood holds 190 litres and is listed at £44.45 on amazon.co.uk, model 262404, with 4.6 from 414 reviews. The bullet measures 45.7 x 82.3 x 57.7 cm outside and 44.6 x 81.6 x 56.6 cm inside, which suits boots, a few cushions and small tools on a short patio rather than a full lounge set. It prints a 110 kg maximum and says the panels go together without tools in under 10 minutes. Reviewers in that star line often describe a click-fit of about 5 to 15 minutes and a dry interior after rain, but the first 50 texts are the same block as the rosewood Signature, so they are not a brown-only sample. The title says weatherproof while the specifications table says water resistant, and no IP code is printed. A customer question asks whether a lock is included, and the specifications do not answer it. The item-dimension table repeats 82.3 cm and drops the 45.7 cm depth, and the shared reviews also mention a 5.7 kg box moving in wind and, in one case, a missing lid latch.
Pros
Cons
Best for: You want the lowest price in this set, a printed 110 kg line and a short 190 litre footprint, and you will add your own padlock.
Less suitable: You need a lock in the carton, a brown-only review sample, or room for a full lounge cushion set.
Specifications
Common questions
Is this Kentwood waterproof?
The title says weatherproof. The specifications table says water resistant. No IP code is printed on the extract.
Does a lock come in the box?
The listing says the lid is lockable. It does not say a lock is included.
Can you sit on the lid?
The bullet says seating for up to two adults and prints a 110 kg maximum. The extract does not say it was tested to BS EN 581-2.
The rosewood Keter Signature is £47.62 for 190 litres, model 271521, and it shows the same 4.6 from 414 as the brown Kentwood. The bullet gives 82.3 x 45.7 x 57.7 cm outside and 81.6 x 44.6 x 56.6 cm inside, with a lift-off lid, built-in handles and a DecoCoat finish stated as 70 percent recycled. It says the shell protects against rain, sun and frost and calls the design weather-resistant, while the table still says water resistant. There is no kilogram figure next to the seat-or-side-table claim, so you cannot quote a sitting load from this page. A padlock-type lid is named, but a padlock is not listed in the carton. The same 50 review texts praise a 5 to 15 minute click-fit and, in one case, five cushions with room left, and they also record a missing latch, a flexible base and an empty box that moves in a breeze at 5.65 kg. One reviewer quotes a 20 kg internal limit that does not appear on this specifications table, so that sentence is not the maker's figure.
Pros
Cons
Best for: You want the rosewood finish and the recycled-content line on the 190 litre footprint, and nobody needs a printed seat load.
Less suitable: You need a kilogram seat figure, a padlock in the box, or reviews that only cover this colour.
Specifications
Common questions
Is the Signature waterproof?
The bullet says it protects against rain, sun and frost and calls the design weather-resistant. The table says water resistant. No IP code is printed.
Is a padlock included?
Lock type is padlock. The extract does not list a padlock among included components.
Which dimensions should you use?
The bullet says 82.3 x 45.7 x 57.7 cm as width, depth and height. The item table repeats 82.3 cm on two sides and does not match that bullet.
The grey Keter Marvel+ is the long chest in this set: £74.01, 270 litres, model 247661, rated 4.5 from 13,398 amazon.co.uk reviews. External size matches on the bullet and the item table at 116.7 x 44.7 x 57 cm, and the internal bullet is 114.4 x 40 x 51.2 cm, so you gain length and give up width. The title says weatherproof, the table says water resistant, and the bullet prints 219.99 kg for seating two adults, with 65 percent recycled content and a one-year warranty line. Reviewers in the first 50 often store tools, wellies, a hose or a strimmer, and several say rain stayed out in moderate weather, while one still wants a cover. The same sample says only two wheels arrive even though clips are mentioned at both ends, and that a product video shows metal strengtheners and soft-close struts this carton does not include. Cushion sets are the recurring miss at 40 cm internal width, and one review says pressure from the contents bends the sides so the lid no longer lines up. The page both says no assembly instructions are included and lists an instruction booklet, and the empty box weighs 6.37 kg.
Pros
Cons
Best for: You have about 117 cm of wall, want 270 litres with a long review history, and you can accept two wheels and a 40 cm internal width.
Less suitable: You need gas pistons, four wheels in the carton, or a deep cushion set that will not pass a 40 cm internal width.
Specifications
Common questions
Is the Marvel+ waterproof?
The title says weatherproof. The specifications table says water resistant. No IP code is printed.
How many wheels are in the box?
Rollable is a special feature. The table does not give a number. Reviews in the extract say two wheels are supplied.
Will garden cushions fit?
The listing says 270 litres and gives an internal size of 114.4 x 40 x 51.2 cm. Several reviews say the cushion set they hoped for did not fit.
Olsen & Smith lists a black 270 litre cushion box and bench at £49.99, with 4.4 from 463 reviews, so the larger label sits close to the 190 litre Keter prices. The title and the first bullet say waterproof, the specifications table says water resistant, and included components name a lock beside a 100 kg seating bullet. The internal bullet is 104.7 x 49 x 53.1 cm, wider than the Marvel+ internal width, but the external bullet of 109 x 51 x 55 cm does not match the item table of 43 x 78 x 56 cm. Several reviewers say cushions, blankets or gazebo parts stayed dry after rain, and several mention a padlock or combination lock in the carton. Sitting is split: some call the lid strong enough, while others say they would not sit on it, so the 100 kg line is not what every owner found. One review says no locking mechanism arrived, and one buyer returned the box as smaller than the photo after estimating six to eight seat cushions, paying £9 to send it back. Assembly is required, with click-fit in the reviews from a few minutes to about 40 minutes, and the empty box weighs 5.6 kg.
Pros
Cons
Best for: You want a 270 litre label near £50 and a listing that names a lock, and you will check the carton size and the lock on the day it arrives.
Less suitable: You need one agreed external size, or you plan to sit on the lid, which reviews in this extract dispute.
Specifications
Common questions
Is this box waterproof?
The title and the first bullet say waterproof. The specifications table says water resistant. No IP code is printed.
Does a padlock come with it?
Included components list a lock. One review in the extract says no locking mechanism arrived.
Which external size is printed?
The bullet says 109 x 51 x 55 cm. The item table says 43 x 78 x 56 cm. The extract does not say which figure to use.
Shelf prices, star ratings and review counts are the amazon.co.uk lines for the four chests in this comparison. The stored score starts at the star rating multiplied by 20, so a 4.6 line starts at 92. A few points then move for a size that agrees, a review sample that is not shared with another listing, a printed kilogram line, a lock named in the carton, and a title that says waterproof or weatherproof while the table says water resistant. Price is not inside the score. It is used only for the best-value flag. There is no lab test, no IP rating and no BS EN 581-2 pass. The two 190 litre listings share one block of review texts, so that count is not two samples.
Stars
90%The start point is the amazon.co.uk star rating multiplied by 20. A 4.6 line starts at 92. The stored score stays within a few points of that start. The star line is not a safety test.
Listing and review checks
10%A few points for a size that agrees, a review sample that is not shared, a printed kilogram line or a lock named in the carton. Points come off when the title says waterproof or weatherproof and the table says water resistant, when a padlock is not in the carton, or when review texts are copied across two listings.
Decide the job first: boots and a few cushions, or a longer chest for a wall of about 117 cm. Then read the internal centimetres, the water line on the specifications table, whether a lock is in the carton, and any kilogram figure before anyone sits. A seller load is not BS EN 581-2, and a waterproof title is not an IP rating. Prices named here are the amazon.co.uk lines in this file, not a UK-wide index.
A waterproof storage box is a lidded outdoor chest for cushions, tools or boots. The four listings in this comparison are resin or plastic, at 190 or 270 litres. Every specifications table says water resistant, even where a title or a bullet says waterproof, weatherproof or weather-resistant. None print an IP code, and none cite BS EN 581-2. Internal centimetres come first. The 190 litre bullets are about 82 by 45 by 57 cm outside.
All four specifications tables say water resistant. A waterproof, weatherproof or weather-resistant heading does not add an IP code. No listing prints one.
An item table that repeats 82.3 cm on two sides is not the bullet. On Olsen & Smith, 109 x 51 x 55 cm and 43 x 78 x 56 cm cannot both be the carton.
Damp cushions are usually wet foam. Store dry items. The two 190 litre listings share one block of review texts, so colour is not a separate sample. Gas pistons on a dearer chest are not in these cartons.
Start with the internal bullet, then the external one. The 190 litre footprint is about 82 by 45 by 57 cm outside. The Marvel+ is 116.7 by 44.7 by 57 cm outside and 114.4 by 40 by 51.2 cm inside. Olsen & Smith prints two external sizes that do not agree. A litre label of 190 or 270 is not a cushion fit. Four seat cushions and two backs are often put near 200 to 250 litres as a retailer rule of thumb, and a 40 cm internal width can still refuse a cushion set. Then read the specifications table.
A lockable lid is not a lock in the carton. Only Olsen & Smith names a lock in the components, and one review says it did not arrive. The Keter pages do not confirm a padlock in the box. A hasp is not a security rating. If anyone will sit, use a printed kilogram line and nothing beyond it. Kentwood prints 110 kg. Olsen & Smith prints 100 kg, and some reviewers will not sit. Marvel+ prints 219.99 kg. Signature prints none. None cite BS EN 581-2.
Three typical situations, each with a recommendation from this comparison.
You have about 82 cm of wall for boots and a few cushions, and you want a printed seat line. The brown Keter Kentwood is 190 litres at about £44.45, with 110 kg printed and a tool-free claim. The listing does not say a lock is in the carton. The first 50 review texts match the rosewood Signature.
You want 270 litres and you can accept two wheels. The grey Keter Marvel+ is 116.7 cm long, at about £74.01, with 4.5 from 13,398 reviews and 219.99 kg printed. The internal width is 40 cm. Reviews say the video's struts are not in the carton.
You want a 270 litre label near the entry price and a listing that names a lock. Olsen & Smith is about £49.99. The bullet is 109 x 51 x 55 cm and the item table is 43 x 78 x 56 cm, so check the carton. One review says the lock did not arrive. A steel box from another shop is not a row on this table.
The Keter Marvel+ 270L is the top pick. It has the highest score, 89, at about £74.01, with 4.5 from 13,398 amazon.co.uk reviews. The external size agrees on the bullet and the item table, and that review sample is not the shared 190 litre block. Best value is the Keter Kentwood 190L at about £44.45, with a printed 110 kg line. Olsen & Smith lists more litres near that price and does not take the value mark, because 109 x 51 x 55 cm and 43 x 78 x 56 cm cannot both be the carton. Neither mark is a laboratory result. No listing prints an IP code or cites BS EN 581-2.
Keter Kentwood 190L
Lowest price in this set, about £44.45, with a printed 110 kg line and a tool-free claim. Not a lab test.
Editorial
Peter F. is the editor for DIY & tools at productscompared.co.uk. Comparisons in this category are checked against amazon.co.uk listings, review evidence and public UK sources.
Guides on what to look for, how to use a product, and common mistakes.
Public UK sources used for this comparison, last checked on 22 October 2026. Listing prices, stars and review counts are the amazon.co.uk lines saved for this set. There is no laboratory test.
Expert source (DIY & tools): Lee Burkhill (Garden Ninja) (external profile) – public expert commentary used as a research source, not as a contributor to our pages.
This page contains affiliate links to amazon.co.uk. If you buy through them, we may earn a commission at no extra cost to you. Prices, stars and review counts are the UK listing lines. We did not run a lab test.
